These ingenious, triangular shaped crayons won't roll away. Made of plastic, not wax, for additional durability, this set of 24-rainbow color, non-toxic crayons stay on the table- just where your little artist put them! They pack into their own sturdy, plastic flip-top case for easy clean up. The unique shape will help develop the preferred grip for later writing skills. Recommended Ages: 3+ years Conforms to ASTM D-4236.